Question # 1

The ability of a body to return to its original shape is called.

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Strain

Stress

Elasticity

Plasticity

The substance which atom cooperates with each other in such a way so as to exhibit a strong magnetic field is called.

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Ferromagnetic

Paramagnetic

Diamagnetic

Non magnetic

Disintegration of photon on striking a nucleus into an electron and positron is known as.

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Annihilation of matter

Compton effect

Pair production

Photo electric effect

The charge number of Ba is.

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197

141

56

85

The term invertor is used for.

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NOR gate

XNOR gate

NAND gate

NOT gate

The mass spectrum of naturally occurring neon shows the most abundant isotope has atomic mass.

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19

20

21

22

In the Bohr's model of the hydrogen atom, the lowest orbit corresponds to:

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Infinite energy

Maximum energy

Minimum energy

Zero energy

Magnetism is related to:

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Stationary charges

Moving charges

Stationary & Movingcharges

Law of motion

The mutual inductance between two coils depends upon their

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Size

Core material

Size, core material and separation

Separation

A metal rod of 1 m is moving at a speed of 1 ms-1 in a direction making an angle 30^o with 0.5 T magnetic field . The emf produced is.

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0.25 N

2.5 N

0.25 V

2.5 V

The name of the scientist who noted that a compass needle was deflected when placed near the current carrying conductor

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Henry

Faraday

Coloumb

Oersted

Radius of first orbit of an atom is r1= 0.053 nm, Radius of second orbit r2 will be.

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0.106 nm

0.212 nm

0.053 nm

0.53 x 10^-10 nm

The existence of positron in 1928 was predicted by

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Anderson

Dirac

Chadwick

Plank

EMF is induced due to change in

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Charge

Current

Magnetic flux

Electric field

The SI unit of Stress is:

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Nm

Nm²

NM^-2

Nm³

A 50 mH coil carries a current of 2.0 a , then energy stored in tis magnetic field is.

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0.1 J

10 J

100 J

1000 J

When nitrogen is bombarded by alpha particles nitrogen nucleus changes into

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Oxygen

Carbon

Barium

Helium

One joule is equal to.

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1.6 x 10¹⁹ eV

1.6 x 10^-19 eV

6.25 x 10^-18 eV

6.25 x 10 ¹⁸ eV

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